{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical"], "input": "To the patients in the second group ( 30 patients ) , percussion - vibration was performed in the 0 degrees supine position , while slightly laterally lying and endotracheal aspiration was performed in the supine position ."}
{"Chemical": []}